August bockel



(No Model.) A. BOOKEL & E. LOOHMANN. SLAT FOR ROLLING SHUTTERS.

No. 422,707. Patented Mar; 4, 1890 UNITED STATES PATENT OFFICE.

AUGUST BUCKEL, OF ERFURT, PRUSSIA, AND ERNST LOCHMANN, OF LEIPSIC,SAXONY, GERMANY.

SLAT FOR ROLLING SHUTTERS.

SPECIFICATION forming part of Letters Patent No. 422,707, dated March 4,1890.

Application filed October 21, 1889. Serial No. 327,683. (No model.)

To all whom it may concern:

Be it known that we, AUGUST BocKEL, of Erfurt, in the Kingdom of Prussiaand German Empire, and ERNST LOCHMANN, of Leipsic, in the Kingdom ofSaxony and German Empire, have invented new and useful Improvements inSlats for Rolling Shutters, of which the following is a specification.

The improved slat for rolling shutters con stituting this invention, andwhich is also applicable for partition-curtains, coverings for hot-houseroofs, seats for garden-chairs, and the like, has the advantage oversimilar devices heretofore in use, in that it admits of being made up inthe form of a flexible chainlike web and is self-fixing instead of beingheld together by canvas, hinges, or like contrivances, the slats beingfitted endwise one into another and being interchangeable.

In the accompanying drawings, Figure I is an end view of one of theslats. Fig. II is an end view showing a series of seven such slatsfitted together in the form of an arc of a circle.

Fig. III shows an elevation of part of a roll ing shutter formed by theslats.

Each slat is formed on one of its longitudinal edges with a tongue orround bead a. The other side of the slat is enlarged, and is providedwith a longitudinal groove 5, formed between the curved lips c and (l,the distance between the edges of said lips being less than I only greatsimplicity in manufacture but also permits of rapid and easy fittingtogether and ready replacement of damaged parts.

What we claim as new, and desire to secure by Letters Patent, is r Aslat for rolling shutters, formed with a round tongue or bead along oneedge and an open groove along the other edge, the mouth of the groovebeing smaller than the interior, whereby the groove is adapted to holdand permit of movement within it of the tongue or bead of a like slatfitted endwise into it,

substantially as set forth.

In witness whereof we have hereunto set our hands in presence of twowitnesses.

AUGUST BOOKEL. ERN$T LOCHMANN. Witnesses:

CARL BORNGRAEBER, THEODOR SOHUMANN.

